JP2011083347A - Puncture needle device for ultrasonic endoscope - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a puncture needle device for an ultrasonic endoscope, capable of preventing a slide member supporting a puncture needle from sliding to such a position that the puncture needle is projected from the distal end of a sheath by gravity or unintentional light contact with a hand or the like even when a lock means for making the puncture needle non-slidable is forgotten to be operated. <P>SOLUTION: The puncture needle device for the ultrasonic endoscope includes: the slide member 50 which supports the puncture needle 55 and is movable to a cylindrical connection part 31 between a projected position at which the distal end of the puncture needle is projected from the distal end of a sheath 42 and a storage position at which the distal end is stored inside the sheath; and an energizing means S1 which exerts energizing force to the slide member at all times and holds the slide member in the state that external force is not applied at the storage position. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a puncture needle device for an ultrasonic endoscope that is used by being inserted into an internal conduit of the ultrasonic endoscope.

Patent document 1 is disclosing the puncture needle apparatus which can be attached or detached with respect to the nozzle | cap | die protrudingly provided on the surface of the ultrasonic endoscope.
This puncture needle device includes a puncture operation portion (cylindrical connection portion) that is a cylindrical member that is attached to and detached from a base, and a puncture needle outer tube slide that is a cylindrical member that is slidably provided inside the puncture operation portion. , A puncture needle projecting slide portion slidably provided inside the puncture needle mantle tube slide portion, and a mantle with one end supported by the puncture needle mantle tube slide portion and the other end projecting outward from the tip of the puncture operation portion A tube (sheath) and a puncture needle, one end of which is supported by a puncture needle mantle tube slide portion and slidable inside the mantle tube, are provided.
The puncture needle protrusion slide part can slide between the retracted position retracted farthest and the protruded position slid most distally with respect to the puncture needle mantle tube slide part. When positioned, the tip of the puncture needle is positioned within the outer tube, and when the puncture needle protruding slide is positioned at the protruding position, the tip of the puncture needle protrudes outward from the tip of the outer tube.

  In addition, the puncture needle mantle slide portion houses a compression coil spring that contacts the puncture needle protruding slide portion positioned at the protruding position without contacting the puncture needle protruding slide portion positioned at the stored position. It is. Therefore, after the compression coil spring is compressed by moving the puncture needle protrusion slide portion to the protrusion position, when the lock means for holding the puncture needle protrusion slide portion in the protrusion position is unlocked, the biasing force of the compression coil spring causes The puncture needle protruding slide part moves to the storage position side.

Japanese Patent Laid-Open No. 9-103433

The puncture needle device for an ultrasonic endoscope of Patent Document 1 includes a lock unit for holding the puncture needle protruding slide portion in the storage position.
However, the puncture needle device for an ultrasonic endoscope is connected to the ultrasonic endoscope (the base) while the operator forgets to lock the locking means, or the ultrasonic endoscope (the base) is connected. When the connection is released, the puncture needle projecting slide portion slides to the projecting position due to its own weight, and the puncture needle projecting from the distal end of the outer tube may damage the internal conduit of the ultrasonic endoscope.

  In the present invention, even when the locking means for making the puncture needle non-slidable is forgotten to operate, the puncture needle is attached to the sheath due to unintentional light contact with its own weight or a hand. An object of the present invention is to provide a puncture needle device for an ultrasonic endoscope that can prevent sliding from a distal end to a position where it protrudes.

  The puncture needle device for an ultrasonic endoscope according to the present invention comprises a cylindrical connecting portion that can be attached to and detached from a base projecting from the ultrasonic endoscope, a part thereof being located within the cylindrical connecting portion, and a distal end thereof. A flexible sheath that protrudes from the cylindrical connecting portion and enters the internal conduit of the ultrasonic endoscope when the cylindrical connecting portion is connected to the base, and is inserted into the sheath so as to be able to advance and retract. A puncture needle, which supports the puncture needle, is movable relative to the cylindrical connecting portion between a protruding position where the tip of the puncture needle protrudes from the tip of the sheath and a storage position where the tip is stored in the sheath. It is characterized by comprising: a slide member; and an urging means for constantly applying an urging force to the slide member and holding the slide member in a state where no external force is applied at the storage position.

  It is preferable to provide a sheath support member that supports the sheath and moves relative to the cylindrical connection portion to adjust the amount of protrusion of the sheath relative to the cylindrical connection portion.

  Preferably, the sheath support member is a cylindrical member containing the biasing means, and the slide member is slidably inserted into the sheath support member.

  According to the present invention, since the urging force of the urging means is always applied to the slide member that supports the puncture needle, the slide member is held in the storage position even if an unintended light contact or the like occurs. Therefore, if the surgeon forgets to lock the locking means for holding the slide member in the storage position, the puncture needle device for an ultrasonic endoscope is connected to the ultrasonic endoscope (base). Even if the connection to the ultrasonic endoscope (the base) is released, the puncture needle does not damage the internal conduit of the ultrasonic endoscope.

  If comprised like Claim 2, it will become possible to adjust the protrusion amount with respect to the cylindrical connection part of a sheath.

  According to the third aspect of the present invention, since the biasing means is prevented from being exposed to the outside by the sheath support member, the appearance is improved and the biasing means is hardly damaged.

It is a side view in the connection state of the ultrasonic endoscope of one Embodiment of this invention, and the puncture needle apparatus which located the slide member in the protrusion position. It is a perspective view of the puncture needle apparatus which made the slide member located in the protrusion position. It is a perspective view of a nozzle | cap | die. It is a vertical side view of the puncture needle device in which the slide member is located at the storage position. It is an expansion vertical side view of the principal part of FIG. It is sectional drawing similar to FIG. 4 which made the slide member located in the protrusion position. It is sectional drawing similar to FIG. 4 of a modification. It is an expansion vertical side view of the principal part of FIG. It is sectional drawing similar to FIG.

Hereinafter, an embodiment of the present invention will be described with reference to FIGS. In the following description, in the front-rear direction, the distal end side of the insertion portion 13 is defined as “front” and the operation portion 11 side is defined as “rear” for the ultrasonic endoscope 10, and the puncture needle device 30 is punctured. The front end side of the needle 55 is “front”, and the stylet support cap 58 side is “rear”. First, the structure of the ultrasonic endoscope 10 to which the puncture needle device 30 can be attached and detached will be described.
The ultrasonic endoscope 10 includes an operation unit 11, an insertion unit 13 that extends forward from the operation unit 11 and includes an ultrasonic probe 12 at the tip, and a light guide that extends from the operation unit 11 to the opposite side of the insertion unit 13. A tube and an ultrasonic image transmission tube (both not shown), and a light guide connector and an ultrasonic image connector are provided at the ends of the light guide tube and the ultrasonic image transmission tube, respectively. The bending portion 14 in the vicinity of the distal end portion of the insertion portion 13 bends in the vertical direction according to the rotation operation of the bending operation lever 15 provided in the operation portion 11. A treatment tool insertion protrusion 16 is provided on the operation portion 11, and a base 17 having a substantially cylindrical shape and open at both ends is provided on the rear end surface of the treatment tool insertion protrusion 16. As shown in FIG. 3, in the vicinity of the distal end portion of the outer peripheral surface of the base 17, a non-circular shaped flange portion 18 is formed by cutting off both sides of a circle along a pair of circular arcs that are symmetrical with respect to the center point of the circle. Projecting. Further, an annular flange 19 having a circular shape in front view is provided on the outer peripheral surface of the base 17 so as to be shifted from the flange portion 18 in the axial direction. Furthermore, inside the operation unit 11 and the insertion unit 13, an internal tube is connected to the treatment tool opening 21 formed at one end connected to the base 17 and the other end positioned at the insertion unit 13 immediately after the ultrasonic probe 12. A path 20 (see FIG. 1) is provided.
The ultrasonic imaging connector is connected to an ultrasonic diagnostic apparatus (not shown), the ultrasonic diagnostic apparatus is connected to a CRT monitor, and the ultrasonic probe 12 is covered with a rubber balloon (not shown). When the ultrasonic switch of the ultrasonic diagnostic apparatus is pressed, an ultrasonic wave is transmitted from the surface of the ultrasonic probe 12 toward the test part, and the ultrasonic probe 12 receives the ultrasonic wave reflected by the test part. An ultrasonic image transmission cable (not shown) for connecting the ultrasonic probe 12 and the ultrasonic image connector is provided inside the insertion unit 13, the operation unit 11, and the ultrasonic image transmission tube. The ultrasonic image received by 12 is electrically processed by the ultrasonic diagnostic apparatus and displayed on the CRT monitor.

Next, the structure of the puncture needle device 30 will be described.
The puncture needle device 30 has a substantially cylindrical tubular connecting portion 31 formed of a hard resin (PC (polycarbonate) or a resin material capable of EOG sterilization such as Noryl). The rear end of the cylindrical connecting portion 31 is open, and a connecting female screw hole 32 communicating with the internal space is formed on the front surface of the cylindrical connecting portion 31. A first lock support member 34, which is a cylindrical member having a diameter larger than that of the cylindrical connection portion 31 and made of hard resin (PC or the like), is concentrically fixed to the rear end portion of the cylindrical connection portion 31. The first lock support member 34 is formed with a female screw hole 35 that penetrates the first lock support member 34 in the radial direction, and the screw portion 37 of the first lock member 36 is screwed into the female screw hole 35. .

  In the internal space of the cylindrical connection part 31 and the first lock support member 34, the outer diameter is smaller than the inner diameter of the cylindrical connection part 31 and is substantially the same as the inner diameter of the rear part of the first lock support member 34. A sheath support member 39, which is a tubular member molded from the same material as the connection portion 31, is inserted so as to be slidable in the axial direction of the tubular connection portion 31 and the sheath support member 39. The rear end of the sheath support member 39 is open, and a holder 40 is fixed to the front end portion inside the sheath support member 39. A rear end portion of a sheath 42 made of a flexible material such as resin is fitted and fixed in a through support hole 41 penetrating the holder 40 in the axial direction, and the front portion of the sheath 42 is a female screw for connection. It protrudes forward of the cylindrical connecting portion 31 through the hole 32. A compression coil spring S <b> 1 (biasing means) that is substantially coaxial with the sheath support member 39 is disposed in the internal space of the sheath support member 39, and the front end portion of the compression coil spring S <b> 1 is in contact with the holder 40. A first stopper member 44, which is a cylindrical member made of hard resin (PC or the like) having a diameter larger than that of the sheath support member 39, is concentrically fixed to the rear end portion of the sheath support member 39. Accordingly, the sheath support member 39 includes a maximum pushing position (the position in FIG. 4) where the first stopper member 44 abuts the rear end surface of the first lock support member 34, and the first stopper member 44 is disposed behind the first lock support member 34. Maximum pull-out position separated from the end face rearward (not shown; the front end portion of the sheath support member 39 is located in the cylindrical connection portion 31, and the holder 40 abuts on the inner peripheral end portion of the first lock support member 34. Is further slidable with respect to the cylindrical connecting portion 31, and the amount of protrusion of the sheath 42 relative to the cylindrical connecting portion 31 is adjusted by sliding the sheath support member 39. it can. Further, when the first lock member 36 is rotated with respect to the female screw hole 35 and the end surface of the screw portion 37 is pressed against the outer peripheral surface of the sheath support member 39, the relative position of the sheath support member 39 with respect to the tubular connection portion 31 is changed. It can be held in a desired position.

In the inner space of the sheath support member 39 and the first stopper member 44, both outer diameters thereof are substantially the same as the inner diameter of the rear end portion of the first stopper member 44, and both ends are formed of the same material as the cylindrical connection portion 31. A slide member 50, which is a tubular member having an opening, is inserted so as to be slidable in the axial direction of the tubular connection portion 31 and the sheath support member 39. A retainer 51 located in the inner space of the sheath support member 39 is provided at the front end portion of the slide member 50, and the rear end portion of the compression coil spring S <b> 1 is in contact with the retainer 51. Furthermore, the center through-hole of the 2nd lock support member 45 which is a cylindrical member consisting of hard resin (PC etc.) is slidably fitted to the outer peripheral surface of the slide member 50. The second lock support member 45 is formed with a female screw hole 46 that penetrates the second lock support member 45 in the radial direction, and the screw portion 48 of the second lock member 47 is screwed into the female screw hole 46. Yes. Accordingly, the position of the second lock support member 45 with respect to the slide member 50 is adjusted, and the end surface of the threaded portion 48 of the second lock member 47 is pressed against the outer peripheral surface of the slide member 50, so that the second lock support member with respect to the slide member 50 is reached. If the position of 45 is fixed, the protrusion amount of the sheath 42 with respect to the cylindrical connection portion 31 when the front end surface of the second lock support member 45 abuts on the rear end surface of the first stopper member 44 can be adjusted.
In the slide member 50, the retainer 51 is positioned at the rear end of the inner space of the sheath support member 39, and the rear end surface of the retainer 51 is in contact with the inner surface 44a of the first stopper member 44 (the rear end surface of the sheath support member 39 is in contact with the slide member 50). 5 and the storage position (the position shown in FIGS. 4 and 5), the front end surface of the second lock support member 45 contacts the rear end surface of the first stopper member 44, and a puncture needle 55 described later. Is slidable with respect to the sheath support member 39 (and the cylindrical connecting portion 31) between the protruding position (the position in FIGS. 1, 2, and 6) protruding from the distal end of the sheath 42. The “projection position” shown in FIGS. 1, 2, and 6 is the “projection position” when the second lock support member 45 is positioned at the rear end of the slide member 50. The “protruding position” when the position of 45 with respect to the slide member 50 is set forward is that the front end surface of the second lock support member 45 spaced forward from the rear end portion 50 a contacts the rear end surface of the first stopper member 44. In addition, the puncture needle 55 described later is a position protruding from the distal end of the sheath 42. Further, even when the slide member 50 is located at the storage position, the compression coil spring S1 is contracted from the free state, so that the urging force of the compression coil spring S1 is always applied to the slide member 50.
Further, as shown in FIG. 4, when the second lock support member 45 is held at the front end position with respect to the slide member 50 by the second lock member 47 and the second lock support member 45 is brought into contact with the first stopper member 44. Even if an external force is applied forward to the slide member 50, the slide member 50 does not slide forward from the storage position.
A front portion of a puncture needle support member 53 made of hard resin (polypropylene or the like) is fitted and fixed in the internal space of the rear end portion 50a of the slide member 50. The support hole 54 formed in the front portion of the puncture needle support member 53 is made of a flexible hollow metal material and has a rear end opened and an opening 55a (see FIG. 1) in the vicinity of the front end. The rear end is fitted and fixed. The front part of the puncture needle 55 is inserted into the sheath 42 through the internal space of the slide member 50. When the slide member 50 is positioned at the storage position, the tip of the puncture needle 55 is positioned inside the sheath 42. However, when the slide member 50 is moved to the protruding position, the tip of the puncture needle 55 protrudes from the tip of the sheath 42 ( (See FIG. 1). A rear space 56 communicating with the support hole 54 is formed at the rear part of the puncture needle support member 53, and a male screw 57 is formed on the outer peripheral surface of the rear part of the puncture needle support member 53.
A stylus support cap 58 made of hard resin (for example, POM) can be attached to and detached from the puncture needle support member 53. At the front portion of the stylet support cap 58, a fitting portion 59 that can be inserted into and removed from the rear space 56 of the puncture needle support member 53 and an outer cylindrical portion 60 located on the outer peripheral side of the fitting portion 59 are concentric. A female screw 61 is formed on the inner peripheral surface of the outer cylindrical portion 60. Furthermore, the rear end of the stylet 63, which is a flexible member, is fixed to the stylet support cap 58. Therefore, when the fitting portion 59 is fitted into the rear space 56 and the female screw 61 is screwed into the male screw 57, the tip of the stylet 63 is inserted into the inner space of the puncture needle 55 from the rear end opening of the puncture needle 55, The front end portion of the let 63 closes the opening 55 a of the puncture needle 55.

Next, a procedure for attaching and detaching the ultrasonic endoscope 10 to the base 17 and a procedure for using the puncture needle device 30 will be described.
In order to connect the puncture needle device 30 separated from the ultrasonic endoscope 10 to the base 17 of the ultrasonic endoscope 10, first, the slide member 50 is positioned at the storage position as shown in FIG. After the end surface of the threaded portion 37 of the first lock member 36 is separated from the outer peripheral surface of the sheath support member 39, the sheath 42 is inserted into the inside of the base 17 and the internal pipe line 20 while inserting the sheath 42. By connecting the female screw hole 32 for connection to the flange portion 18 of the base 17 and rotating the cylindrical connection portion 31 around its axis with respect to the base 17, the front end surface of the cylindrical connection portion 31 comes into contact with the annular flange 19. The flange 18 and the connecting female screw hole 32 are screwed together. Further, the first stopper member 44 is slid with respect to the cylindrical connection portion 31 to adjust the distal end of the sheath 42 to a state where the distal end of the sheath 42 protrudes about several millimeters from the treatment instrument opening 21 (see FIG. 1). The position of the first stopper member 44 is fixed by tightening the member 36. In the puncture needle device 30 of the present embodiment, the slide member 50 is positioned at the storage position by the urging force of the compression coil spring S1, so that the operator forgot to lock the second lock member 47 during the connection operation. However, the slide member 50, the retainer 51, the puncture needle support member 53, and the puncture needle 55, unless the operator's hand or the like is in contact with the slide member 50 with a strong force (a force stronger than the biasing force of the compression coil spring S1). The slide member 50 slides to the protruding position by the weight of the stylet support cap 58 and the stylet 63, and the tip of the puncture needle 55 does not protrude from the tip of the sheath 42. Therefore, the internal conduit 20 is not damaged by the puncture needle 55 during the connection work of the puncture needle device 30 to the ultrasonic endoscope 10.

When the puncture needle device 30 is connected to the ultrasonic endoscope 10 (the base 17) in this way, the puncture needle device 30 is brought into a stationary state with respect to the base 17 (the ultrasonic endoscope 10). Therefore, the surgeon can operate the puncture needle device 30 connected to the ultrasonic endoscope 10 while viewing the image displayed on the CRT monitor. For example, when the stylet support cap 58 is unscrewed from the puncture needle support member 53 and the stylet support cap 58 is moved rearward with respect to the puncture needle support member 53, the stylet 63 extends from the inside of the puncture needle 55. Can be pulled out. Further, the second lock member 47 is rotated to separate the end surface of the screw portion 48 from the outer peripheral surface of the slide member 50 (the lock by the second lock member 47 is released), and then the compression coil spring S1 is compressed. If the slide member 50 is slid forward, the puncture needle 55 moves to the distal end side with respect to the sheath 42, and the distal end of the puncture needle 55 projects from the distal end of the sheath 42 when the slide member 50 moves to the projecting position. (See FIG. 1). Further, by adjusting the slide position of the second lock support member 45 with respect to the slide member 50, the puncture needle 55 protrudes from the distal end of the sheath 42 when the second lock support member 45 comes into contact with the first stopper member 44. The amount can be adjusted. Furthermore, if the external force applied to the slide member 50 is released after the slide member 50 is slid forward against the biasing force of the compression coil spring S1, the slide member 50 is automatically moved to the storage position by the biasing force of the compression coil spring S1. Move back to.
When it is desired to remove the puncture needle device 30 from the ultrasonic endoscope 10, the cylindrical connection portion 31 is rotated relative to the base 17 in the direction opposite to that when the puncture needle device 30 is attached to the connection female screw hole 32 and the base 17 (the collar 18. ) Is released. When the puncture needle device 30 is pulled backward from the base 17 after the connection is released, the puncture needle device 30 is separated from the ultrasonic endoscope 10, and the sheath 42 is formed in the inner pipe 20 of the ultrasonic endoscope 10. Move to the 17th side. In this embodiment, since the slide member 50 is positioned at the storage position by the urging force of the compression coil spring S1, even if the operator forgets to lock the second lock member 47 during the extraction operation, the operator Unless the hand or the like touches the slide member 50 with a strong force, the tip of the puncture needle 55 is positioned in the sheath 42. Therefore, the inner conduit 20 is not damaged by the tip of the puncture needle 55.

As mentioned above, although this invention was demonstrated based on the said embodiment, this invention can be implemented, giving various changes.
For example, you may implement in the aspect of the modification shown in FIGS. 7-9 (The same code | symbol is attached | subjected to the same member as the said embodiment).
The sheath support member 71 of the puncture needle device 70 of this modification is longer than the sheath support member 39, and the front end surface of the first stopper member 44 is the first lock when the sheath support member 71 is located at the maximum pushing position (the position shown in the drawing). The support member 34 is separated rearward from the rear end surface (a stopper (not shown) restricts the sheath support member 71 from sliding forward from the maximum pushing position). Further, an annular stopper 72 is integrally provided on the inner peripheral surface of the sheath support member 71. The slide member 73 is longer than the slide member 50, and an annular flange 75 that can abut against the annular stopper 72 from the front is formed at the front end portion of the retainer 74 fixed to the front end portion of the slide member 73. The slide member 73 has a storage position where the annular flange 75 abuts against the annular stopper 72 with respect to the sheath support member 71 (and the cylindrical connection portion 31) (the position shown in FIGS. 7 and 8), and a second lock support member. The front end surface of 45 is in contact with the rear end surface of the first stopper member 44, and the puncture needle 55 is slidable between a protruding position (a position in FIG. 9) from which the distal end of the sheath 42 protrudes. The front and rear ends of the tension coil spring S2 (biasing means) are fixed to the retainer 74 and the inner surface 44a of the first stopper member 44, respectively. The tension coil spring S2 is also used when the slide member 73 is located at the storage position. The stretched state is slightly extended from the free state (the tensile force always reaches the slide member 73 from the tension coil spring S2).
The puncture needle device 70 configured as described above is also slid even when the lock by the second lock member 47 is released when the slide member 73 is located at the storage position (even if the screw portion 48 is separated from the slide member 73). Unless a strong external force (a force stronger than the biasing force of the tension coil spring S2) is applied to the member 73, the slide member 73 is held in the storage position by the biasing force of the tension coil spring S2, and the puncture needle support member 53, The slide member 73 does not slide to the protruding position due to its own weight of the puncture needle 55, the stylet support cap 58, the stylet 63, the slide member 73, and the retainer 74. If no forward external force is applied to the slide member 73, the slide member 73 automatically moves to the storage position by the biasing force of the tension coil spring S2. Therefore, the puncture needle device 70 of the present modification can exhibit the same effects as the puncture needle device 30.

  The biasing means for moving and biasing the slide members 50 and 73 provided inside the puncture needle devices 30 and 70 to the storage position is other than the compression coil spring S1 and the tension coil spring S2, such as a magnet set (for example, sheath support). The magnet fixed to the front end part of the members 39 and 71, and the magnet fixed to the front end part of the slide members 50 and 73 which generate a repulsive force between the said magnets may be sufficient.

DESCRIPTION OF SYMBOLS 10 Ultrasound endoscope 11 Operation part 12 Ultrasound probe 13 Insertion part 14 Bending part 15 Bending operation lever 16 Treatment tool insertion protrusion 17 Base 18 Gutter part 19 Annular flange 20 Inner channel 21 Treatment tool opening 30 Puncture needle Device 31 Tubular connection portion 32 Female screw hole for connection 34 First lock support member 35 Female screw hole 36 First lock member 37 Screw portion 39 Sheath support member 40 Holder 41 Through support hole 42 Sheath 44 First stopper member 45 Second lock support Member 46 Female screw hole 47 Second lock member 48 Screw part 50 Slide member 51 Retainer 53 Puncture needle support member 54 Support hole 55 Puncture needle 56 Rear space 57 Male screw 58 Stylet support cap 59 Fitting part 60 Outer cylindrical part 61 Female screw 63 Stylet 70 Puncture needle device 71 Sheath support member 72 Annular stopper 73 Slide member 7 The retainer 75 annular flange S1 compression coil spring (biasing means)
S2 Tension coil spring (biasing means)

Claims (3)

A cylindrical connecting part that can be attached to and detached from a base protruding from the ultrasonic endoscope;
Flexibility in which a part is located in the cylindrical connecting portion, the tip protrudes from the cylindrical connecting portion, and enters the internal conduit of the ultrasonic endoscope when the cylindrical connecting portion is connected to the base. A sheath having
A puncture needle inserted into the sheath so as to be able to advance and retreat;
A slide member that supports the puncture needle and is movable relative to the cylindrical connecting portion between a protruding position where the tip of the puncture needle protrudes from the tip of the sheath and a storage position where the tip is stored in the sheath;
An urging means that constantly exerts an urging force on the slide member and holds the slide member in a state in which an external force is not applied at the storage position;
A puncture needle device for an ultrasonic endoscope, comprising: The puncture needle device for an ultrasonic endoscope according to claim 1,
A puncture needle device for an ultrasonic endoscope comprising a sheath support member that supports the sheath and moves relative to the cylindrical connection portion to adjust the amount of protrusion of the sheath relative to the cylindrical connection portion. The puncture needle device for an ultrasonic endoscope according to claim 2,
The sheath support member is a cylindrical member containing the biasing means;
A puncture needle device for an ultrasonic endoscope, wherein the slide member is slidably inserted into a sheath support member.

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